Moving Man - Distance vs. Time Graphs

This is an activity designed as an introductory exercise to Distance vs. Time graphs and only basic graphing skills are needed to complete the activity.
The students will:
Develop a general knowledge of Distance vs. Time graphs.
What a graph of a person standing still would look like
What graphs of a person moving either towards or
away from an observer would look like.
How differences in speed appear on the graph.